Speaker, Speaker Box, Piezo Tweeter manufacturer / supplier in China, offering 1.4 Inch Throat Diameter Bolt on 107dB Sensitivity Compression Driver (NBM-75D), D405 Trio 300W 4" Voice Coil Selemium Driver De-1001, 1 in Plastic Horn with Ferrite Driver 150 Watts Horn Tweeter (DE-1125) and so on.